Thousands of researchers supplied
5+ years in business
6-panel tested, COA on every lot
Same-day processing

Thousands of researchers supplied

5+ years in business

6-panel tested, COA on every lot

Same-day processing

99%+ PURE6/6 TESTEDRESEARCH USE ONLY

TB-500

Thymosin Beta-4

Also known as Tβ4 · thymosin β4

Technical specifications

Compound information

Product profile

What is TB-500?

Type: Acetylated 43-residue peptide
Sizes: 5mg · 10mg
Release purity: ≥ 98.0% by HPLC
Testing: 6-panel, every lot
CAS number: 77591-33-4
Molecular weight: 4,963 g/mol
Formula: C₂₁₂H₃₅₀N₅₆O₇₈S
Amino acids: 43

Storage requirements

Stability and handling

Lyophilized (sealed vial): −20 °C or below for long-term stability
Reconstituted: 2 to 8 °C, used within a timeframe suited to the compound

Avoid repeated freeze-thaw cycles
Keep dry
Protect from direct light

FAQ

Frequently asked questions

Every lot goes through our 6-panel testing protocol: identification by ESI-MS, purification by RP-HPLC, conformity, sterility screening, quantification of net peptide content, and LAL endotoxin screening. We publish the full analytical data in each lot's Certificate of Analysis.

Store lyophilized peptides at -20°C or below for long-term stability. Once reconstituted, store them at 2 to 8°C and use them within a timeframe suited to the compound. Avoid repeated freeze-thaw cycles. Keep them dry and away from direct light.

Orders confirmed by 3:00 PM Pacific on a business day are processed the same day. Orders placed after 3:00 PM Pacific time or on weekends and holidays begin processing the next business day. Standard shipping is free on orders over $150. Every order ships in insulated packaging, with ice packs when needed. Standard delivery usually takes 2 to 4 business days within the continental US.

No. All compounds sold by Genesis Peptides are strictly for in vitro and preclinical laboratory research purposes only. They are not approved for human consumption, therapeutic use, or diagnostic purposes. By purchasing, you confirm the products will be used solely for legitimate research applications.

A Certificate of Analysis (COA) is the report our analytical laboratory issues for one lot. It gives the result of every quality control test run on that lot. Each COA includes HPLC chromatograms, mass spectra, endotoxin results, and quantification data where applicable. Our COA Library has one for every lot we have shipped.

Yes. We offer institutional pricing for universities, research institutions, and laboratories with recurring needs, starting at 100+ units and scaling with volume. Contact our team for a custom quote.

Verified test results

Every lot tested before it ships

All certificates

Each lot runs the 6-panel release test, and its certificate of analysis is published. Measured values are in each lot's certificate.

Certificate of analysis

≥ 98.0%

Release spec, purity by HPLC

Every lot must reach this purity before release. Each certificate records the lot's measured values.

6-panel tested

Open the COA library

Full QC panelAcceptance criteria

Identification
± 0.1 DaSpec
Purification
≥ 98.0%Spec
Conformity
Conforms to specSpec
Sterility
≤ 10² CFU/gSpec
Quantification
Within ± 5%Spec
Endotoxin
≤ 0.05 EU/mLSpec

Important research notice

Research Use Only. TB-500 is sold exclusively for laboratory research. It is not approved by the FDA for any diagnostic or therapeutic use in humans, and Genesis Peptides makes no claims regarding human clinical efficacy.

Research findings described on this page are derived from preclinical studies (animal models and in vitro experiments) and are provided for reference only.

FOR RESEARCH USE ONLY. Products are sold exclusively for in vitro and preclinical laboratory research. Not for human consumption or administration. Not intended for diagnostic or therapeutic use. These statements have not been evaluated by the FDA.

99%+ PURE6/6 TESTEDRESEARCH USE ONLY

Important research notice

Research findings described on this page are derived from preclinical studies (animal models and in vitro experiments) and are provided for reference only.

TB-500

Compound information

What is TB-500?

Stability and handling

Frequently asked questions

Every lot tested before it ships

Important research notice

TB-500

Compound information

What is TB-500?

Stability and handling

Available in blends

Frequently asked questions

Every lot tested before it ships

Every lot on record

Every lot tested before it ships

Important research notice

More research compounds

Available in blends

Every lot tested before it ships

Every lot on record

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